John Webster, a 220-pound college running back turned elementary-school teacher in Queens, says 6-year-old Rodrigo Carpio hurt his knee and ankle and basically humiliated him to the point that he sought professional therapy.

The New York post is reporting that Webster claims the student fractured his ankle, and injured his knee. The 4-foot-2, 50 pound 6-year-old kicked and pinched the 27-year-old Webster, the school’s principal, a security officer, and another teacher during a temper tantrum in April.

“It’s sort of like an angel-devil sort of thing,” said Webster, who recently filed a notice of his intent to sue the city and says he must now wear braces on his right ankle and knee.

“[Rodrigo] looks like an angel, but then, all of a sudden, that halo turns into horns. It’s been a nightmare. It’s embarrassing. It’s humiliating,” Webster added.

Jorge Carpio, Rodrigo’s father, claims the lawsuit is bogus. “How could my little boy do so much damage? My poor son,” he said.

“This is a terrible thing to say [about] a child. To every mother, their child is an angel” Rodrigo’s mother, Josefa Marcia da Silva added. “I know that he has problems, but he doesn’t deserve to be called such names.”

The school’s “occurrence report” states that Rodrigo karate-kicked Webster in the knee and ankle when he told the child to stop horse playing in the hall.

“I tried to hold his wrists, and he began biting me,’’ Webster said. “I took him to the principal’s office, and he kicked me in the ankle, and one kick landed right on my knee. I felt a pop.”

Webster’s lawyer, Andrew Siben of Bay Shore, LI, said school officials were repeatedly warned about Rodrigo but did not protect his client.

“This kid is clearly a tiny terror,” he said. “It’s sad that teachers like Mr. Webster are not offered protection from someone who can endanger other teachers and students.”